Results 11 to 20 of about 60 (60)

The asymmetric effect of fiscal policy on private consumption and private investment over a business cycle: Evidence from Sub‐Saharan African countries

Regional Science Policy &Practice, Volume 15, Issue 6, Page 1147-1162, August 2023., 2023
Abstract This study examines the response of private consumption and private investment to an exogenous shock of fiscal policy and estimates the size of fiscal multipliers during periods of economic slacks and positive output gap. Panel vector autoregressive (VAR) estimation technique is performed on a sample of 18 Sub‐Saharan African (SSA) countries ...
Gabriel Temesgen Woldu
wiley   +1 more source

Ideal extensions of ordered sets

International Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 53, Page 2847-2861, 2004., 2004
The ideal extensions of semigroups—without order—have been first considered by Clifford (1950). In this paper, we give the main theorem of the ideal extensions for ordered sets. If P, Q are disjoint ordered sets, we construct (all) the ordered sets V which have an ideal P′ which is isomorphic to P, and the complement of P′ in V is isomorphic to Q ...
Niovi Kehayopulu
wiley   +1 more source

Extended blocker, deletion, and contraction maps on antichains

International Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 10, Page 607-616, 2003., 2003
Families of maps on the lattice of all antichains of a finite bounded poset that extend the blocker, deletion, and contraction maps on clutters are considered. Influence of the parameters of the maps is investigated. Order‐theoretic extensions of some principal relations for the set‐theoretic blocker, deletion, and contraction maps on clutters are ...
Andrey O. Matveev
wiley   +1 more source

A note on operators of deletion and contraction for antichains

International Journal of Mathematics and Mathematical Sciences, Volume 31, Issue 12, Page 725-729, 2002., 2002
The operators of deletion and contraction for clutters are generalized to those for antichains of finite bounded posets. A generalization of the result by Seymour (1976), describing the relationship between the operators of deletion, contraction, and the blocker map, is considered as a comparison in the lattice of antichains of a poset.
Andrey O. Matveev
wiley   +1 more source

Some results on ordered filters of implicative semigroups

International Journal of Mathematics and Mathematical Sciences, Volume 26, Issue 12, Page 731-735, 2001., 2001
We introduce a special set in an implicative semigroup. Using it, an equivalent condition of an ordered filter is stated. We prove that an ordered filter can be represented by the union of such sets.
Young Bae Jun
wiley   +1 more source

On ideals of implicative semigroups

International Journal of Mathematics and Mathematical Sciences, Volume 27, Issue 2, Page 77-82, 2001., 2001
We introduce the notion of ideals in implicative semigroups, and then state the characterizations of the ideals.
Young Bae Jun, Kyung Ho Kim
wiley   +1 more source

On blockers in bounded posets

International Journal of Mathematics and Mathematical Sciences, Volume 26, Issue 10, Page 581-588, 2001., 2001
Antichains of a finite bounded poset are assigned antichains playing a role analogous to that played by blockers in the Boolean lattice of all subsets of a finite set. Some properties of lattices of generalized blockers are discussed.
Andrey O. Matveev
wiley   +1 more source

Positive implicative ordered filters of implicative semigroups

International Journal of Mathematics and Mathematical Sciences, Volume 23, Issue 12, Page 801-806, 2000., 2000
We introduce the notion of positive implicative ordered filters in implicative semigroups. We show that every positive implicative ordered filter is both an ordered filter and an implicative ordered filter. We give examples that an ordered filter (an implicative ordered filter) may not be a positive implicative ordered filter.
Young Bae Jun, Kyung Ho Kim
wiley   +1 more source

On chains and posets within the power set of a continuum

International Journal of Mathematics and Mathematical Sciences, Volume 18, Issue 2, Page 305-309, 1995., 1993
Transfinite induction is employed to construct a copy of an arbitrary partially‐ordered set of cardinality at most c within the power set (quasi‐ordered by sub‐chain embeddability) of the real line.
P. T. Matthews, T. B. M. McMaster
wiley   +1 more source

Conrad’s Partial Order on P.Q.-Baer *-Rings

Discussiones Mathematicae - General Algebra and Applications, 2018
We prove that a p.q.-Baer *-ring forms a pseudo lattice with Conrad’s partial order and also characterize p.q.-Baer *-rings which are lattices. The initial segments of a p.q.-Baer *-ring with the Conrad’s partial order are shown to be an orthomodular ...
Khairnar Anil, Waphare B.N.
doaj   +1 more source